CN101434476A - Sealing plugging material and use thereof in shield break-in and break-out construction - Google Patents
Sealing plugging material and use thereof in shield break-in and break-out construction Download PDFInfo
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- CN101434476A CN101434476A CNA2008102046625A CN200810204662A CN101434476A CN 101434476 A CN101434476 A CN 101434476A CN A2008102046625 A CNA2008102046625 A CN A2008102046625A CN 200810204662 A CN200810204662 A CN 200810204662A CN 101434476 A CN101434476 A CN 101434476A
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Abstract
The invention discloses a leakage stoppage material which contains the following components according to weight percentage: mud making agent: 1.5 to 3.0 percent, lost circulation additive: 0.5 to 1.0 percent, inert substance used in construction: 1.0 to 2.0 percent and the balance of water. The inert substance used in construction is in the shape of grains with different sizes and is mixed by the grains, and contains one or a plurality of the following components: mica, vermiculite, proper exciple, asbestos, rubber grains and sawdust. The invention also discloses a construction method which uses the leakage stoppage material for plugging in the construction, in which tunnel shields come in and out, and the method comprises the following procedures of: (1) installing a sealing installment near a tunnel portal confine; (2) setting pressing and injecting holes and emergency injecting holes; and (3) gradually adding the leakage stoppage material in a muddy water circulatory system and pouring the leakage stoppage material into the ground clearances through the pressing and injecting holes and the emergency injecting holes so as to stop the leakage when leakage occurs in the process of pushing the tunnel shield in and out. The leakage stoppage material has the advantages of rapid effect of stopping leakage, strong sealing capacity and wide application range, and can be used for stopping the leakage in the construction process of pushing the tunnel shield in and out in various soil layers.
Description
Technical field:
The present invention relates to a kind of Tunnel Engineering muddy water slurry material, particularly a kind of novel sealing and plugging material and the application method in shield structure turnover hole construction thereof.
Background technology:
In tunnel construction; the turnover hole operation of shield structure is the critical process that shielding method is built the tunnel, and the quality of this operation construction will directly influence the effect of the axis quality of building up tunnel, back or pipeline, the environment protection of inlet and outlet cave place even have influence on the success or failure of engineering construction.The turnover hole technology of shield structure must be formulated according to the grade of the residing hydrogeology of engineering, envrionment conditions and environmental protection requirement; turnover hole Duan Eryan for slurry balance shield; the sealing of hole structure void is a key issue; as not properly settling; will cause hole seepage, surface subsidence, and have un-envisaged consequences.The shield structure is in the process of turnover hole, and hole and shield structure housing will form the annular structure void.Muddy water is scurried into the construction that influences in the well in active well and the shield structure in a large number by this structure void outside portal when preventing to pass in and out the hole, must well behaved hermetic seal device be set at the place, hole, guarantees the correct foundation and the construction safety of initial mud and water balance.
At present, the method that shield structure turnover hole clearance seal adopts usually is that unidirectional hinged plate adds the technology of " cord rubber plate ", and prerequisite is to guarantee in the construction that " cord rubber plate " do not rout up in well." cord rubber plate " is that a kind of interim sealing that shield engine or push bench use when starting or finish to advance ends native tightness system, its shape decides according to the heading equipment profile, circle is arranged, square and rectangle, this device is installed in the portal circle, its structure is by steel collar, ring rib baffle plate, the hinge fanning strip, cord rubber plate (the big flanged plate of rubber), compositions such as pressing plate, and be provided with some Grouting Pipe, its function is: after the portal block wall cuts, shield engine breaks ground to cut and begins to advance, the dregs or the mud that cut (are sent into Tu Cang, mud and dregs mix) can be stopped effectively by the sealing device and avoid outflow or excessive in the development machine hull outside, thereby soil pressure or mud hydraulic pressure in the native storehouse are remained within the force value of setting, cave in and land subsidence to prevent the front soil body.Aforesaid method is to rely on the protection fastening and unidirectional articulated slab of " cord rubber plate " to prevent that the soil body runs off outside the hole in well, but this can't thoroughly stop band to press the seepage of muddy water, thereby causes the pressure equilibrium of shield engine otch to be difficult to set up.
Find by prior art documents, the patent No. is that 200520048061 Chinese patent " a kind of cave entrance waterproof appts of shield tunnel " has been specifically related to a kind of cave entrance waterproof appts that is used for shield tunnel, this device is provided with rubber plate in walling crib ingress, and it is carried out pressing by air bag and Steel Spring Plate, seal request when satisfying shield, when shield, airbag aeration expands, rubber plate closely is wrapped in shield structure or lining cutting outside surface, make that gap location has good watertightness between shield structure and the walling crib, improve the safety coefficient of shield.Again, the patent No. is that 200520048063 Chinese patent " a kind of outlet water-proof device for large diameter shield tunnel " discloses a kind of outlet water-proof device for large diameter shield tunnel that is used for the exit of shield tunnel place, this device comprises walling crib, be set with vertical surface steel plate and horizontal plane steel plate on the walling crib, vertical surface steel plate place is fixed with the water proof rubber plate, on the horizontal plane steel plate, be fixedly connected with two wire brushes at least, the pre-buried oil addition pipe that is provided with on the horizontal plane steel plate between the wire brush.Yet above patent is all started with from configuration aspects, attempt to improve tightness system to reach the purpose of antiseep, in case but tightness system lost efficacy and seepage takes place, then above-mentioned patent just can't be dealt with problems, and therefore single tightness system still is difficult to avoid the generation of seepage situation.
The measure of generally taking under the tightness system failure condition at present is, when the hole seepage takes place and adopts pipe laying drainage shutoff when difficulty is sealed, be pressed into common grouting serous fluid to finish the shutoff in portal gap by drainage tube, but adopt this method still to have following shortcoming: because common grouting serous fluid is easily diluted in muddy water, cause its shut-off capacity greatly to descend, and the initial set of these slurries needs certain hour, therefore this method take effect slower, thereby cause adverse consequencess such as land subsidence, distortion are bigger easily.
Summary of the invention:
Technical problem to be solved by this invention is to overcome the shortcoming of existing shield engine turnover hole shutoff with grouting serous fluid, provide that a kind of shut-off capacity is strong, the sealing and plugging material of leak stopping instant effect, it can be when shield structure turnover hole carry out leak stopping at the holes of the different sizes of all kinds of soil layers.The present invention also provides the application method of a kind of described sealing and plugging material in shield structure turnover hole construction.
It is as follows that the present invention solves the technical scheme that its technical problem takes:
A kind of sealing and plugging material, its composition weight proportioning is: pulping agent 1.5～3.0%, plugging agent 0.5～1.0%, building inert substance 1.0～2.0%, surplus is a water.
Building inert substance in the sealing and plugging material of the present invention is a particulate state, and it is mixed by size particles not at the same level, and this building inert substance contains one or more the combination wherein of mica, vermiculite, shell, asbestos, rubber grain and wood sawdust.
A kind of constructional method of using described sealing and plugging material in the construction of shield structure turnover hole is characterized in that: described constructional method adopts sealing and plugging material of the present invention to carry out seepage between shutoff shield structure turnover hole circle and shield structure, and its operation steps is as follows:
(1) the hermetic seal device is installed at portal circle place;
(2) pressure grouting hole and emergent grouting hole are set;
When (3) in the shield structure progradation seepage taking place, utilize the sealing patching materials to be pressed into or to pour in the circle of hole to finish leak stopping to breakthrough by pressing grouting hole and emergent grouting hole.
Compared with prior art, the present invention at the emergency case owing to the reason generation seepage of tightness system, adds the described sealing and plugging material of this patent and carries out shutoff on the basis of existing slurry shield turnover hole tightness system in muddy water circulatory system.Pulping agent in the sealing patching materials composition is the initial pulping material that contains macromolecular compound such as polypropylene Barbiturates, and it can solidify in the stratum very soon, forms the framework that is covered with whole muddy water system space grid structure; Building inert substance in the sealing patching materials composition and plugging agent all contain mica, vermiculite, shell, asbestos, rubber grain and the sawdust of different size particles, thereby it can infiltrate in the holes of different sizes in the soil layer, in time play plugging action; In addition, because this building inert substance is a particulate state, it has wider grade distribution, so sealing and plugging material of the present invention can be by mixing the building inert substance of variable grain level, adapt to all kinds of stratum, as clay seam, sand layer etc. with different big fine porositys.
In a word, the present invention has the advantage of the strong and wide accommodation of leak stopping instant effect, shut-off capacity, when it can be used in shield structure turnover hole construction in all kinds of soil layers to the sealing and plugging in space between hole circle and the shield structure.
Description of drawings:
Fig. 1 is a fundamental diagram of the present invention.
Embodiment:
Below in conjunction with specific embodiment the present invention is described in further detail.
Certain Tunnel Engineering adopts φ 14.87m gasbag-type slurry balance shield to construct.Long 1270 meters of tunnel, single shell lining is adopted in lining cutting, is general ring wedge shape section of jurisdiction, its external diameter 14.5m, 13.3 meters of internal diameters, 2 meters of ring widthes.Plane, tunnel axis slightly is instead " S " type, and minimum profile curvature radius is 1000m, and vertical axis is " V " type, and turnover hole section ruling grade is 4.5%, 8.6 meters of the most shallow earthing in tunnel.
This project adopts sealing and plugging material of the present invention to carry out seepage between shutoff shield structure turnover hole circle and shield structure in construction.The composition weight proportioning of described sealing and plugging material is: pulping agent 1.5～3.0%, and plugging agent 0.5～1.0%, building inert substance 1.0～2.0%, surplus is a water.Building inert substance in the described sealing and plugging material is meant a kind of physicochemical characteristic that is used for construction work interpolation material more stable, that be difficult for reacting with other material; it is a particulate state; mix by size particles not at the same level; having wider grade distributes; this building inert substance contains a kind of or wherein several combination wherein of mica, vermiculite, shell, asbestos, rubber grain and wood sawdust, it plays filling pore and improves retaining wall stability in sealing and plugging effect.Pulping agent in the described sealing and plugging material and plugging agent are by the ready-made series product of purchasing on the market, for being exclusively used in the additive of material of construction, it is produced by the super space oil of the subordinate of North China Oilfield branch office of PetroChina Company Ltd. Renqiu City ignition dope company limited, and product brand is a magnificent tunnel board (HS).Described pulping agent is made up of high-molecular weight polypropylene Barbiturates, polypropylene nitrile salt, fiber-like salt, calcium entry blocker, Synergistic additives etc., it is the initial pulping material that forms the space grid structure framework that is covered with whole muddy water system, it can solidify in the stratum very soon, can play thickening, flocculation and improve the effect of rheological.Described plugging agent also contains the former vegetable fibre and the inert substance of variable grain grating, but the hole of the different sizes in the shutoff soil layer plays preventing that ground from emitting slurry and excavation face soil layer to stride the effect of collapsing.
The different components weight proportion of several embodiment of described sealing and plugging material is as follows:
Embodiment one:
Pulping agent 1.5%, plugging agent 1.0%, building inert substance (containing mica, shell, rubber grain and wood sawdust) 1.5%, surplus is a water.
Embodiment two:
Pulping agent 3.0%, plugging agent 0.5%, building inert substance (containing vermiculite, asbestos and wood sawdust) 2.0%, surplus is a water.
Embodiment three:
Pulping agent 2.3%, plugging agent 0.8%, building inert substance (containing shell) 1.0%, surplus is a water.
Above-mentioned certain Tunnel Engineering concrete steps that the described sealing and plugging material of application is constructed in shield structure turnover hole construction are as follows:
(1) the hermetic seal device is installed at portal circle place
Muddy water is scurried into outside portal in the well by the structure void between hole and the shield structure housing when preventing shield structure turnover hole, at first at portal circle place the hermetic seal device is set.What sealing antipriming first road adopted is doughnut-shaped steel plate, and what the second road antipriming adopted is that the cord rubber plate is in conjunction with thin Steel Spring Plate.Because the shield structure exists with certain gradient,, but remain vertical mutually with the shield structure so the position of doughnut-shaped steel plate on the liner pre-embedded steel slab can be adjusted.The sealing antipriming can stop dregs mud outflow that most shield machine cuttings get off or excessive, thereby soil pressure or mud hydraulic pressure in the native storehouse are remained within the force value of setting, caves in and land subsidence to prevent the front soil body.
(2) pressure grouting hole and emergent grouting hole are set;
Be to guarantee the stagnant water effect at circle place, hole behind the shield structure turnover hole, arranging evenly that along the outer ring 12 (establishing 1 for per 30 °) diameters are 1 between the twice cord rubber plate on the casing " the pressure grouting hole, to strengthen the box sealing effect; Pre-buried emergent grouting hole on hole circle in 260 ° of scopes on the outer top of circle, hole, arranges that evenly 14 diameters are 1 in addition " emergent grouting hole (establishing 1 for per 20 °), emergent use when hermetic seal device effect is bad.
(3) when in the shield structure progradation seepage taking place, in muddy water circulatory system, add described sealing and plugging material gradually and adjust muddy water, the composition weight proportioning of sealing patching materials is: pulping agent (model HS-1) 2.0%, plugging agent (model HS-2) 0.5%, wood sawdust 1.2%, surplus are water.
In the construction process of shield structure turnover hole section, hole mainly is created in following several aspects:
1. the bolt place around the portal circle;
2. the unfairness of shield engine housing or weldering meet cause and the cord rubber plate between hole;
The hole that causes the cord rubber plate to destroy when 3. shield engine enters the cord rubber plate and produce.
When one of above three kinds of situations or three were taken place simultaneously, the sealing patching materials infiltrated formation pore by pressing grouting hole and emergent grouting hole.See also Fig. 1 fundamental diagram of the present invention, at first bigger particle big hole 4 places in stratum 5 are blocked and under stopping, small particles infilters tiny hole 4 then in plugging agent 2 and the building inert substance 1, form plugging structure; Driving along with the shield structure, earth amount in the undisturbed soil increases, colloidal solid also increases thereupon, the density of muddy water, viscosity also rise naturally, because the adding of patching materials, the macromolecular material in the pulping agent 3 can form fine and close mud film, filling pore space on the plugging structure surface soon, thereby in time stop seepage, reach the effect of leak stopping.
After having adopted sealing and plugging material of the present invention to carry out shutoff in this engineering, the seepage phenomenon greatly reduces, indivedual breakthroughs have played the effect of getting instant result behind the described sealing and plugging material of filling, the plugging effect of breakthrough be improved significantly, according to statistics, the total wastage of muddy water accounts for total flux ratio 1.5%.
Sealing and plugging material of the present invention can be according to the geologic condition of shielded construction, adjust the ratio and the grain composition of each component, to adapt to Different Strata with different aperture, so wide accommodation of the present invention, has stronger shut-off capacity under different soil, different aperture condition, stronger structural capacity is arranged in clay seam and suppress dispersive ability, the effect of stronger structural capacity and tackify is arranged in the sand layer.
In a word, sealing and plugging material of the present invention has the leak stopping instant effect, shut-off capacity is strong and adaptation The advantage that scope is wide, simple, the successful of its construction, not only leak stopping but also leakproof can subtract simultaneously Little shield-tunneling construction is to the impact of surrounding enviroment, close when being applicable to shield structure turnover hole construction in all kinds of soil layers Shutoff is leaked, and is particularly useful for the constructing tunnel of Large Slurry Shield, especially in diameter surpassing greater than 14m The effect of portal leak stopping is particularly remarkable in the large-diameter shield construction.
Claims (4)
1, a kind of sealing and plugging material is characterized in that: the composition weight proportioning of this material is: pulping agent 1.5～3.0%, and plugging agent 0.5～1.0%, building inert substance 1.0～2.0%, surplus is a water.
2, sealing and plugging material according to claim 1 is characterized in that: described building inert substance is a particulate state, and it is mixed by size particles not at the same level.
3, sealing and plugging material according to claim 2 is characterized in that: described building inert substance contains one or more the combination wherein of mica, vermiculite, shell, asbestos, rubber grain and wood sawdust.
4, a kind of in the construction of shield structure turnover hole application rights require the constructional method of 1,2 or 3 described sealing and plugging materials, it is characterized in that: described constructional method employing claim 1,2 or 3 described sealing and plugging materials carry out the seepage between shutoff shield structure turnover hole circle and shield structure, and its operation steps is as follows:
(1) the hermetic seal device is installed at portal circle place;
(2) pressure grouting hole and emergent grouting hole are set;
When (3) in the shield structure progradation seepage taking place, utilize the sealing patching materials to be pressed into or to pour in the circle of hole to finish leak stopping to breakthrough by pressing grouting hole and emergent grouting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102046625A CN101434476A (en) | 2008-12-16 | 2008-12-16 | Sealing plugging material and use thereof in shield break-in and break-out construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102046625A CN101434476A (en) | 2008-12-16 | 2008-12-16 | Sealing plugging material and use thereof in shield break-in and break-out construction |
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| CN101434476A true CN101434476A (en) | 2009-05-20 |
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| CNA2008102046625A Pending CN101434476A (en) | 2008-12-16 | 2008-12-16 | Sealing plugging material and use thereof in shield break-in and break-out construction |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094659A (en) * | 2010-12-29 | 2011-06-15 | 上海隧道工程股份有限公司 | Shield entry spring hinge plate sealing device |
| CN102305083A (en) * | 2011-08-01 | 2012-01-04 | 北京市三一重机有限公司 | Shield machine and anterior shield system thereof |
| CN103867158A (en) * | 2014-02-28 | 2014-06-18 | 中铁隧道集团有限公司 | Underwater drilling fast blockage air bag and blockage method thereof |
| CN105697024A (en) * | 2016-03-10 | 2016-06-22 | 上海隧道工程有限公司 | Tool-changing construction method for super-large-diameter slurry air balanced shield machine in soft soil stratum |
| CN106675538A (en) * | 2016-12-22 | 2017-05-17 | 上海三瑞高分子材料股份有限公司 | Plugging-type shield mud |
| CN109253847A (en) * | 2018-11-21 | 2019-01-22 | 江苏凯宫隧道机械有限公司 | Shield owner drives sealing performance detection test tool and detection method |
| CN111794780A (en) * | 2020-03-31 | 2020-10-20 | 中铁十六局集团北京轨道交通工程建设有限公司 | Shield tunneling machine in-out hole safety guarantee method for water-rich round gravel stratum |
| CN112431989A (en) * | 2020-10-23 | 2021-03-02 | 浙江迅犀建设有限责任公司 | Method for quickly repairing leakage of pipe orifice of PE (polyethylene) solid-wall drain pipe |
| CN113279815A (en) * | 2021-05-31 | 2021-08-20 | 中国矿业大学(北京) | Anti-explosion multi-bag type air bag and truss structure combined sealing device and method |
| CN114735971A (en) * | 2022-02-28 | 2022-07-12 | 中铁隧道局集团有限公司 | Composite paste and preparation and application thereof |
-
2008
- 2008-12-16 CN CNA2008102046625A patent/CN101434476A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094659A (en) * | 2010-12-29 | 2011-06-15 | 上海隧道工程股份有限公司 | Shield entry spring hinge plate sealing device |
| CN102305083A (en) * | 2011-08-01 | 2012-01-04 | 北京市三一重机有限公司 | Shield machine and anterior shield system thereof |
| CN103867158A (en) * | 2014-02-28 | 2014-06-18 | 中铁隧道集团有限公司 | Underwater drilling fast blockage air bag and blockage method thereof |
| CN103867158B (en) * | 2014-02-28 | 2017-01-25 | 中铁隧道集团有限公司 | Underwater drilling fast blockage air bag and blockage method thereof |
| CN105697024A (en) * | 2016-03-10 | 2016-06-22 | 上海隧道工程有限公司 | Tool-changing construction method for super-large-diameter slurry air balanced shield machine in soft soil stratum |
| CN106675538A (en) * | 2016-12-22 | 2017-05-17 | 上海三瑞高分子材料股份有限公司 | Plugging-type shield mud |
| CN109253847A (en) * | 2018-11-21 | 2019-01-22 | 江苏凯宫隧道机械有限公司 | Shield owner drives sealing performance detection test tool and detection method |
| CN111794780A (en) * | 2020-03-31 | 2020-10-20 | 中铁十六局集团北京轨道交通工程建设有限公司 | Shield tunneling machine in-out hole safety guarantee method for water-rich round gravel stratum |
| CN112431989A (en) * | 2020-10-23 | 2021-03-02 | 浙江迅犀建设有限责任公司 | Method for quickly repairing leakage of pipe orifice of PE (polyethylene) solid-wall drain pipe |
| CN113279815A (en) * | 2021-05-31 | 2021-08-20 | 中国矿业大学(北京) | Anti-explosion multi-bag type air bag and truss structure combined sealing device and method |
| CN114735971A (en) * | 2022-02-28 | 2022-07-12 | 中铁隧道局集团有限公司 | Composite paste and preparation and application thereof |
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Open date: 20090520 |